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Chicxulub Impact as a Trigger of One of Deccan Volcanism Phases: Threshold of Seismic Energy Density

One of the hypotheses of mass extinction at the Cretaceous–Paleogene boundary is associated with a sharp increase in the volcanic activity of the Large Igneous Province of Deccan due to the impact of a ten-kilometre asteroid near the Gulf of Mexico [1, 2]. A sudden increase in mantle effective permeability (MEP) initiated by seismic disturbances of the impact was considered in [2] as a cause of the increase in the flow rate of magma. We used an empirical method to estimate the density of seismic energy dissipated in the ground at various distances. The threshold of energy density for increasing the MEP and the energy density released in the province of Deccan after the Chicxulub impact have been revised using this method. It is shown that the threshold values of the energy density can be an order of magnitude higher. At the same time, the use of refined data on seismic efficiency and energy of the Chicxulub impact allows us to increase the density of dissipated energy in the province of Dean also by an order of magnitude. Thus, our analysis supports the idea that the Deccan volcanism could be accelerated by the Chicxulub impact occurred at a distance of about 13,000 km.

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The authors are grateful to reviewers for a thorough analysis of the work and useful comments. We also want to thank Vladimir Svettsov for helpful discussions. The work was performed as part of the program of the Russian Academy of Sciences (project 0146-2018-0005).

1. Sadovsky Institute of Geospheres Dynamics RAS, Leninskiy Prospekt 38-1, Moscow, 119334, Russia

   Valery Khazins & Valery Shuvalov

1. Valery Khazins
2. Valery Shuvalov

Correspondence to Valery Khazins .

1. Sadovsky Institute of Geospheres Dynamics RAS, Moscow, Russia

   Gevorg Kocharyan

2. Sadovsky Institute of Geospheres Dynamics RAS, Moscow, Russia

   Andrey Lyakhov

© 2019 Springer Nature Switzerland AG

Khazins, V., Shuvalov, V. (2019). Chicxulub Impact as a Trigger of One of Deccan Volcanism Phases: Threshold of Seismic Energy Density. In: Kocharyan, G., Lyakhov, A. (eds) Trigger Effects in Geosystems. Springer Proceedings in Earth and Environmental Sciences. Springer, Cham. https://doi.org/10.1007/978-3-030-31970-0_55

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• DOI: https://doi.org/10.1007/978-3-030-31970-0_55

• Published: 17 November 2019

• Publisher Name: Springer, Cham

• Print ISBN: 978-3-030-31969-4

• Online ISBN: 978-3-030-31970-0

• eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)

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